Hello group,

I’d like to inform you about the changes made in the two last 
homenet-prefix-assignment updates.

http://tools.ietf.org/html/draft-pfister-homenet-prefix-assignment-02

The changes are mostly about fixing typos, but a few technical changes have 
been made as well (based on the experience gained from the implementation of 
the Prefix Assignment Algorithm over HNCP).


 — Changes between 00 and 01

- If a Delegated Prefix is included in another Delegated Prefix, it is ignored. 
This is intended to improve support for non-homenet routers that provide prefix 
sub-delegation. That way, sub-delegated prefixes are ignored.

- Adding network leader definition (The router with the highest identifier).

- Add a section about DHCPv6 downstream prefix delegation. For downstream 
RFC7084 routers support.

- Adding Delegated Prefix deprecation procedure in order to differentiate 
prefix deprecation and node disconnection. When a node disconnect, the DPs 
advertised by this node may be kept some time (depending on the DP's 
lifetimes). But if a DP is actively deprecated, nodes must stop using it 
immediately. 


 — Changes between 01 and 02

- Designated router election can make use of the information provided by the 
flooding protocol (i.e. when no router is designated yet, only the highest 
router id present on the link can become designated).

- New implementation guideline in appendix concerning "prefix waste avoidance". 
It proposes an algorithm that provides a good trade-of between randomness, 
pseudo-randomness and prefix selection efficiency.



Comments are welcome,

Pierre Pfister
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